Paper-fastening punch.



M. GESSLER.

PAPER FASTENING PUNCH.

APPLICATION msn FEB. 14. |913.

Patented Aug. 3, 1915.

COLUMBIA PLANOURAPH Co.. WASHINGTDN. u. c.

MAXIMILIAN GrESSLER, OF MILWAUKEE, WISCONSIN.

PAPER-FAS'TENING PUNCH.

Specification of Letters'Patent.

Patented Aug. 3, 1915'.

. Application filed February 14, 1913. Serial No'. 748,319.

T0 all whom it may concern:

Be it known that I, MAXIMILIAN GEssLER,

a citizen of the United States, and resident l of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented new and useful Improvements in Paper-Fastening Punches, of which the following is a description, reference being had `to the accompanying drawings, which are a part of this specification.

This invention relates to punches of the type-which during the punching operation cut a sealing strip from the paper and tuck it through a slot in the paper.

An 'object of the invention is to provide a punch which will cut a paper locking strip with its end larger than the slot or opening through which it is tucked, thus securely locking the paper strip against disengagement from the opening.

With the above and other objects'in View the invention consists in the paper fastening punch as herein claimed and all equivalents.l f l Referring to the accompanying drawings in which like characters of reference indicate the same parts in diierent views: Figure 1 is a sectional elevation of a paper fastening punchwconstructed in accordance with this invention; Fig. 2 is a face view of the punch carrying the jaw thereof; Fig. 3 is a similar view of the other jaw thereof; Fig. 4 is a bottom view of the die plate with the punch knives fitting therein; Fig. 5 is a sectional view of the jaw members similar to Fig. 1, but showing the parts in the position assumed by theml vwhen the punch kniveshave completed their cutting operation and the locking finger is ready to begin its swinging movement to insert the llocking strip of the paper through the opening cut therefor; Fig. 6 is a similar view of the Aparts 'showing the jaw members moved nearer together and the locking nger swung outwardly in the performance of its work; Fig. 7 is a similar view showing the'ffinal movement ofthe j aw members together, the locking finger having completed its work before forcing the locking strip of paper through the opening provided for it; Fig. 8 is a plan view'of a portion of the paper showing the'work performed by this punch; Fig. 9 is a sectional view thereof; Fig. 10 is a view similar to Fig. 6 showing a modified construction of the means for operating the locking finger; and, Fig. 11 is a sectional view of parts thereof. Y

In these drawings 15 and, 16 indicate the die and punch jaws respectively of anhand punch, the handles 17 of which are connected therewith in the ordinary manner for causing the jaw members to move toward and awayfrom each otherfwhile maintaining their parallel relation, the usual spring 18 being providedk to pull'the jaw members apart and the usual stripperplate'lQ being present to permit the punch knives to free themselves from the paper. lThe punch' jaw 16 carries a pair-,of knife punches 20 and 21 which are preferably of one strip of sheet metal bent to an inverted Ufshape with its ends bent to the shape desired for the re-V spectivecuts in the paper, these ends being sharpenedv and tempered toconstitute the punch knives. Both of ithe punch knives 2O and 21 are of a U-shape in cross section, v

but the punch knife 2O has its curved or arched portion of larger diameterthan the distance between the parallel straight portions thereof so that the tongue or locking strip of paper cut thereby will have a larger end or head portion than its stem portion. The die plate22 isl providedwith a single die opening as seen in Fig.y t to receive both of the punchknives `20 and 21 and to closely fit therewith to produce shearing action eX- cept at the spacebetweenthe punch knives. The result of this varrangement is that the punch knives cut two tongues from the paper and while being in alinement with each other their uncut parts by whichthey are hinged to the sheet of paper are spaced a short distance apart as seen'in Fig. 8.

-A rhoop-shaped locking finger 23 is pivotally mounted between the parallel straight side portions of the punch knife 20 and it is normally held with its hook-like end con'- tained within the punch knife 20, as shown in Fig. 1, by means of a 'coil spring 24;, but during the closing movement of the awl members the upper protruding portion of the locking finger 23 engages a cross bar 25 which is formed between the openings of the stripper plate 19 which are somewhat larger than the punch knives and are both of the vshape of the punch knife 20 as shown in Fig. 3. The engagement' of the upper por- I the locking strip of paper 26 cut by punch knife l and push it against the paper strip 27 cut by punch knife 21 and force them both through the slot or opening cut by punch knife 2l far enough to permit the lateral extending edge-s of the head portion of the locking strip 26 to spring outwardly after passing through the opening and thus lock the strips of paper .against a return movement through the opening. The engagement of the locking nger with the locking strip at an intermediate'position of the locking finger is shown'in `Fig. 7. In the opening lmovement of the jaw members the locking linger is returned to its rposition within the punch knife 20 by thespring 24 and the punch knives return through the openings in the paper produced by them, the'punch knife 21 which has its sides cut away-above its cutting edgesl serving to lift the' lateralprojecting portions of the enlarged end or head ofthe Ylocking strip 26l as it passes therebyybut said edges spring into their locking position as soon as left by the punch knife. 'This return travel of the punch knife 21 serves to assist` in the proper positioning of the enlarged or head ed end of the locking strip 26 through the slot or opening `in the paper provided for it, if such position of the locking strip should not be completed by the locking finger, as during an operation involving an incomplete movement of the locking finger. In the modified form vof the device shown in Figs. 10 and 11 the cross bar-25 of the stripper plate is omittedvso that the stripper plate has vonly the one opening through which both of the punch knives pass and the upper end of the locking finger 23 has a pin 2S to engage therstripper plate 19 at Y the sides of the opening'thereof to effect the pair of Jaw members, a pair of punch knives on one jaw member one of the punch knives being substantially U-shape in cross section, and having its bent portion wider than its other portion to cut a tongue from the paper withan enlarged free end and the other punch knife adapted to cut an opening in the paper, a die plate on the other jaw.

member having a die opening corresponding in shape with the shape of thepunch knives,

a locking finger pivotally mounted on one of the punch knives, means in the path of the locking finger to be engaged thereby to cause it to move and force the tongue cut by the first mentioned punch knife through the opening cut by the other punch knife.

2. In a paper fastening punch, a pair ofn jaw members, a pair of punch knives on one jaw member, one of the knives lbeing U- shaped in cross section and wider at its bent portion than at its other portion so as to cut a tongue with an enlarged free end from the paper and the other punch knife adapted to cut an opening in the paper, a spring retracted hook-shaped locking finger pivotally tongue cutting punch knife, a die plate on mounted between Ythe side walls of saidV the other j aw member having a die `opening v through which the punch knives pass, va

stripper plate between the jaws-members, said locking finger being adaptedto engage? the stripper plate and be caused thereby to `swing to push the enlarged end `of the tongue cut by said punch knife through the opening cut by the other punch knife.

3. lIn a paper fastening punch, a pair of jaw members, a pair of punch knives on one jaw member, one of said punch knives being- U-shaped'in cross section and wider at its bent portion than at its other portion tof cut' a tongue with an enlarged endfrom the paper andthe other punch knife adapted to`V cut an opening in the paper, a hookshaped spring retracted locking finger' pivf.

otally mounted between the side walls of said tongue cutting punch knife, a Vdie plate on the other jaw member having a die opening through which the punch knives pass, a'

stripper plate between the jaw members having openings through which the punch knives pass and across bar between said to cause the locking finger to swing and push the enlarged end of, the tongue through the opening cut by the other punch knife.

Y openings to be engaged by the locking finger 4. In a paper fastening punch, apair of jaw members, a pair of punchV knives on one of the jaw membersone of said punch knives being U-shaped in cross section and wider at its bent portion than at its other portion to cut a tongue lwith an enlarged end from the paper and the other punch knife adapted to cut an opening in the paper, a hook-shaped spring retracted locking finger pivotally mounted between the side portions of said tongue cutting punch knife, a die plate on the other jaw member having a die opening through 'which the punch knives pass, a stripper plate between the jaw members having an opening through which the punch knives pass,and a projection on the locking finger for engaging the stripper plate to swing the locking fingerand force v the enlarged endV of the tongue through the opening cut by the'other punch knife.

iso

In a paper fastening punch, a pair of jaw members, a pair of punch knives on one jaw member, one of said punch knives being U-shaped in cross section and having its bent portion Wider than its other portion to cut a tongue with an enlarged end from the paper While the other punch knife is adapted to cut an opening in the paper and has its sides cut away above its cutting edge to form hook-like side parts, a die plate on the other jaw member having a die opening through which the punch knives pass, a finger operated by the movement of the jaw members toward each other for moving the enlarged end of the tongue toward the opening cut by the punch knife With hook-shaped sides, said hook-shaped sides of the punch knife being adapted to engage the enlarged head of the tongue and draw it through said opening on the return movement thereof.

In testimony whereof, I aHiX my signature, in presence of two Witnesses.

MAXIMILIAN GESSLER. Witnesses:

R. S. C. CALDWELL, KATHERINE HoLT.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

